| | Non-parapneumonic effusion | Parapneumonic effusion | P value | n=16 | n=22 |
| Serum level | | | | White blood cell count (×109/L) | 9.8(4.9, 14.2) | 15.7(11.5, 19.4) | | Neutrophil (%) | 79.5(62.2, 82.2) | 81.2(72.9, 86.1) | | C reactive protein (mg/L) | 75.0(12.7, 125.5) | 177.6(129.9, 264.6) | <0.00 | Procalcitonin (ng/mL) | 0.18(0.09, 1.09) | 0.92(0.27, 3.94) | | LDH (U/L) | 227.0(208.0, 248.0) | 221.0(180.8, 271.0) | | nucleus (ng/mL) | 38.6(23.2, 73.7) | 125.5(60.0, 281.3) | | mitochondria (ng/mL) | 21.2(15.0, 36.8) | 31.8(14.5, 126.0) | | Pleural fluid | | | | White blood cell count (×106/L) | 0.37(0.14, 0.95) | 2.90(1.35, 11.01) | <0.00 | Neutrophil (%) | 8.0(3.5, 23.8) | 84.0(60.0, 89.0) | <0.00 | pH level | 8.0(7.9, 8.3) | 7.0(6.8, 8.1) | | LDH (U/L) | 92.5(72.5, 415.5) | 1035.5(593.0, 2645.8) | <0.00 | nucleus DNA (ng/mL) | 1.8 (0.2, 59.1) | 10300.0(1420.0, 14200.0) | <0.00 | mitochondria DNA (ng/mL) | 1.8(1.1, 13.7) | 243.0(95.7, 491.5) | <0.00 |
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